Distribution: Known in Washington only from San Juan County; British Columbia south to California, east to Arizona and Texas.
Habitat: Sandy areas, paths and roadsides.
Growth Duration: Annual
Conservation Status: Threatened in Washington (WANHP)
Annual, terrestrial herbs, the stems erect, red in age, simple or bushy-branching, 2-6 cm. tall.
Leaves opposite, sessile, ovate to oblong, 1-3 mm. long, acute or rounded.
Flowers usually 2 per node in the leaf axils, on pedicles 0.2-6 mm. long; sepals usually 4, lanceolate, 0.5-2 mm. long, pointed; petals as many as sepals, spreading, whitish, triangular, 0.6-1 mm. long; stamens as many as sepals.
Follicles ascending, ovoid, 1-2 seeded.